1 系统环境
Keepalived-1.2.2 ：http://www.keepalived.org/software/keepalived-1.2.2.tar.gz
OS: CentOS 5.7
HAProxy：http://haproxy.1wt.eu/download/1.4/src/haproxy-1.4.20.tar.gz
我的ip环境：
haproxy keepalived 主：192.168.200.104:1080
haproxy keepalived 备：192.168.200.101:1080
vip：192.168.200.181
web：192.168.200.104:8080 192.168.200.104:9090
2 Keepalived安装
1.tar -zxvf keepalived-1.2.2.tar.gz
2.cd keepalived-1.2.2
3../configura --prefix=/
执行这一步可能出现如下错误：
configure: error:
!!! OpenSSL is not properly installed on your system. !!!
!!! Can not include OpenSSL headers files.
解决办法：
[root@master ~]# yum -y install openssl-devel
4.make && make install
5.cd /etc/keepalived/
6.mv keepalived.conf keepalived.conf.default
7.vi keepalived.conf
vrrp_script chk_http_port {
script /etc/keepalived/check_haproxy.sh"
Interval 2
weight 2
global_defs {
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state MASTER #192.168.200.104，在192.168.200.101上则改为BACKUP
interface eth0
virtual_router_id 51
priority 200 #192.168.200.104，在192.168.200.101上则改为100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
track_script {
chk_http_port
}
virtual_ipaddress {
192.168.200.181
}
}
8.vi /etc/keepalived/check_haproxy.sh
#!/bin/bash
A=`ps -C haproxy --no-header |wc -l`
if [ $A -eq 0 ];then
/usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/haproxy.cfg
sleep 3
if [ `ps -C haproxy --no-header |wc -l` -eq 0 ];then
/etc/init.d/keepalived stop
fi
fi
9.chmod 755 /etc/keepalived/check_haproxy.sh
3 安装HAProxy
haproxy的安装见链接：http://blog.csdn.net/zilong00007/article/details/7275235
4 测试
1./etc/init.d/keepalived start （这条命令会自动把haproxy启动）
2.停掉主上的haproxy，3秒后keepalived会自动将其再次启动
3.停掉主的keepalived，备机马上接管服务